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appearance as argument number 1

(subclass Joystick ComputerInputDevice)	ComputerInput.kif 615-615	Joystick is a subclass of computer input device
(documentation Joystick EnglishLanguage "A type of ComputerInputDevice with a stick that can be activated to control a cursor in the X and Y directions. A Joystick may or may not have an attached button for clicking.")	ComputerInput.kif 617-620	Joystick is a subclass of computer input device
(disjoint Joystick Trackball)	ComputerInput.kif 629-629	Joystick is disjoint from trackball

appearance as argument number 2

(termFormat EnglishLanguage Joystick "joystick")

antecedent

(=>
    (and
        (instance ?ACT UserDirectAction)
        (patient ?ACT ?JOYSTICK)
        (instance ?JOYSTICK Joystick))
    (instance ?ACT JoystickMotion))

consequent

(=>
    (instance ?ACT JoystickMotion)
    (exists (?JOYSTICK)
        (and
            (patient ?ACT ?JOYSTICK)
            (instance ?JOYSTICK Joystick))))

If X is an instance of joystick motion, then there exists Y such that Y is a patient of X and Y is an instance of joystick